Revised water usage and classification Water Quality Criteria Amending Section Nos. 68 and 69, chapter III of the 1978 NPCC Rules and Regulations (corrected version). officers'accreditation.

Bibliografiske detaljer
Format: Bog
Sprog:English
Udgivet: Phils. DENR (1990)
Serier:DENR Administrative Order No. 34 Series of 1990
Fag: